Logical
Logical adjective - According to the rules of logic.
Usage example: the lawyer won the case with a logical argument about the motives of the suspect
Sound is a synonym for logical in rational topic. In some cases you can use "Sound" instead an adjective "Logical", when it comes to topics like characteristic, sane, probable, reasoned.
Mutual synonyms
Both words in one sentence
- No matter how sound or logical the plan, Chris always seems to impulsively forget it at the last second and go on doing as he pleases.
Source: Wiki / The Shipof Fools - The Zany Scheme maker comes up with a sound and logical plan.
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It's not actually meant to be quite as grotesque as that word makes it sound, though it's pretty close; they're more ruthlessly logical than brutal.
Source: Eyes Do Not Belong There
Cite this Source
Sound and Logical. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/logical/sound
Logical & Sound. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/logical/sound>.
Sound or Logical. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/logical/sound.
Google Ngram Viewer shows how "logical" and "sound" have occurred on timeline